Pre-thorn: The main drive of the needle machine is driven by a crank-linkage mechanism, needle plates and needles together to make up and down reciprocating movement, fluffy fiber network in the feed to the curtain clamp into the acupuncture zone, when the needle plate downward movement, puncture needle into the fiber net, fiber net close to the tray, when the needle plate upward movement, The friction between the fiber net and the needle makes the fiber net and the needle move upwards together, fiber network close to the stripping plate, feeding and output speed, can be intermittent step, also can be continuous movement, fiber network through the acupuncture zone, with a certain strength, density and thickness, and then sent to the main acupuncture.